Electrical apparatus for therapeutic purposes.



No. 755,121. PATENTED MAR. 22, 1904:- F. C. FISHER.

ELECTRICAL APPARATUS FOR THERAPEUTIC PURPOSES.

APPLICIATION FILED SEPT. 21, 1903.

H0 MODEL.

mfmKK W was UNITED STATES Patented. March 22, 1904.

PATENT OFFICE.

FREDERICK COURTENAY FISHER, OF BRISTOL, ENGLAND.

SPECIFICATION forming part of Letters Patent No. 755,121, dated March22, 1904.

Application filed September 21, 1908. Serial No. 174,075. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK CoUR'rENAY FISHER, a subject of the Kingof Great Britain, and a resident of Bristol, in the county ofGloucester, England, have invented certain new and useful Improvementsin Electrical Apparatus for Therapeutic Purposes, (for which I haveapplied for a patent inGreat Britain, No. 13,937, dated June 23, 1903,)of which the following is a full, clear, andeXact specification.

This invention relates to improvements in electric apparatus fortherapeutic purposes, whereby an electromagnetic and faradic orelectromagnetic faradic current may be supplied.

Referring to the annexed drawings, Figure 1 is a plan view of myinvention as applied to a belt to be worn on the body, showing thearrangement for the electromagnetic and faradic current; Fig. 2, a planview of my invention applied to what I term a pad; Fig. 3, a sideelevation of interrupter; Fig. 4, an end elevation of same.

Referring to Figs. 1 and 2, I place along the belt a number ofinduction-coils d, which are arranged in groups of equal number, eachgroup being carried by one of the sliding pieces a sliding on belt a,the primary circuits of which (shown by the dot-and-dash lines) areconnected up in series and supplied with current from a suitable battery(0, carried on the person, the secondary circuits being connected asshown, the following being the path of the current: One end of thesecondary circuitwire 6 is attached to the resistance-plate c and passesfrom thence to the first coil d. All the secondary coils are thenconnected in series, the disks 6 and f being the terminals in thesecondary circuit 6 and are connected as shown. The resistance-plate caforesaid may be made of any suitable material, such as wood fiber, andconsists of the pivoted arm Z, engaging with the contact-points m, so asto vary the resistance. I introduce into the primary circuit aninterrupter w, as shown in Figs. 3 and 4;, which consists of laminatedcores a and 0,

which carry the coils p and q, the armature r being pivoted to the arm8, attached to the laminated cores, the current passing along the arm 8,through the armature 0', to the coils p and g, the contact being brokenat point zfby the attraction of the armature to the coils. It will thusbe seen that secondary currents are rapidly induced in secondarycircuit. The belt is worn so that the disks aforesaid are in contactwith or annexed to the body, the current passing from the disks 6 to thedisks f through the body.

Referring to Fig. 2, in this case the coils are conveniently arrangedupon a pad a, the interrupter and the resistance-plate being provided asin the case of the belt. This pad may be used for various purposes, suchas by providing in conjunction therewith a pair of socks which would beconnected with the end of the secondarycircuit-wires a". At the sametime the pad is also provided with the handles so that it may beconveniently handled, and, if desired, the pad may be worn on anyconvenient part of the body where it is not convenient to use a belt, inwhich case an electromagnetic effect would be produced upon the wearer.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In electric apparatus for therapeutic purposes in combination, a seriesof electric induction-coils, a belt carrying said series ofinduction-coils, an interrupter also carried by the said belt andinserted in the primary circuit, said interrupter consisting oflaminated cores, coils surrounding said laminated cores, a pivotedarmature, a fixed arm or lever extending over said pivoted armature, acon- -tact-point carried by said arm and engaging with said armature,springs holding said armature in contact position, the current beingbroken between the armature and said point when the armature is directedto the coils, aforesaid series of induction-coils being arranged ingroups, and all connected in series, the secondary circuit of each groupbeing connected to contact-plates which when the belt is worn are inContact With the body so that the current passes from one contact orpair of contact-plates to another through the body,

' an adjustable resistance-plate carried by the belt and inserted in thesecondary circuit substantially as described herein.

